Frederick g



F. G. GRUEN.

wms wAcH. APPLICATION FILED MAY 29,;I9I3.

Patented May 20, 1919.

FREDERICK G. GRUEN, 0F CINCINNATI, 0

OFFICE.

HIO, ASSIGNOR TO THE D. GRUEN WATCH COMPANY, 0F CINCINNATI, OHIO, A CORPORATION OF OHIO.

WRIST-WATCH.

Application iled May' 29,

To all whom t may concern Be itknownthat I, FREDERICK G. GRUEN, a citizen of the United States of America, and resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Improvement in Wrist- IVatches, of which the following is a specification.

An object of my invention is to produce an improved wrist watch which is particu- 'larly adapted for use in positions where the wearer is exposed t0 the weather, as in the trenches employed in modernwarfare, where the necessity of accurate time keeping is of vast importance lwhen certain movements are to be carried out following a preparatory barrage or .other maneuver.

. This and other objects are attained in the wrist Watch described in the following` specification and illustrated in the accompanying drawing, in which;

Figure 1 is a plan view of a watch embodylng my invention. Fig. 2 is a transverse sectional view taken on the line 2 2 of Fig. 1, the case directly containing the Watch movement, being shown in elevation.

. Fig. 3 is a view similar to Fig. 2, but showing the case which directly contains the watch movement, moved to a position which wifll permit of its being wound, a portion of the elements shown in Fig. 2, having been removed.

My improvedwatch consists of an inner case '4 containing the watch movement, located within an outer case 5, which is secured to a wrist strap 6 Iby means of a pair of loo A7 vand8, extending from the opposite si es of the outer case.

The inner case is provided with the usual and setting stem 9 u on one side,

while 'ametrically opposite t 's a' hook Specification of Letters Patent.

Patented May 20,1919. 1918. Serial No. 237,189.

tion with screw threads formed on the bezel 15 of the case, so that the outer case may be closed tightly upon the inner case to exclude water and dirt, the outer crystal 16 bearing upon the inner crystal 17 to prevent movement of the inner case within the outer.

In Winding or setting the watch contained within the outer case, 1t is but necessary to unscrew the bezel of the outer case vand to lift the watch proper to the position disclosed in Fig. 3. If it is desired to remove the watch proper completely, it is lifted directly from the case, thereby detaching the hook from the flange aperture.

Having thus described my invention, what I claim is;

A waterproof military wrist watch comprising an outer case having a flange with a notch and an aperture at diametrically opposite points, an inner case with a windmg stem and diametrically opposite the-stem a hook adapted detachably to engage the subscribed my name this 24th day of'May,

' FREDERICK e. GRUEN.

Witnesses: W. THORNTON Boom, WALTER F. MURBAY. 

